Calculator.



HL C. PETERS.

CALCULATOR. APPLICATIQK man :uns a. 194125..

H. C. PETERS.

i CALCULATOR.

APPLICATION TTLED xuNE a l '1.91'5.

Patented Feb; 5,1918.

l2 SHEETS-SHEET 3.

H. c. mens v l CALCULATORl l APPLICATION FILED )UNE 3| 1915.

VA iii-i la E nl rammed Feb.,5,191& 'A

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H.. c. PETERS.

CALCULATOR. e APELICATIUN FILED }'UN E 3| 19l5. 4

' Patented Feb. 5, 1918.

H. C." PETERS. CALCULATOR.

. APPLLCATLON .FILED JUNE a. i915'.

Peeented Feb. 5,1918.

. L2 SHEETS-SHEET l'.

CALCULATOR.

MPLiCATiON FILED JUNE 3| 1915.

Patented' Feb. 5, 1918;

12 SHEETS-SHEET a.

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CALCULATOR. APeLxcATloN FILED JUNE a, 1915.

I2 SHEETS-SHEET H.

CALCULATOR.

, APPLICATION FILEDJUNE 3, 1915. 1,255,821. f e Petented Feb. 5,1918.

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165 P` .#R 862 'P 160 R 450 P 197 P 860 R 1477s P 1162 P 450Y R *R 967 P v197 R 1162. R 2526s P 97 R 1470s -R P 2526s 'R v 1477s P'- 856s P 1% R v84:95 R l 65910 Ew@ *P R als E. v *P *PI 165 P 165 P 852 P 852 P 460 P 460 P 1457s P 1457s P 1% R e5# R P. :k yP 172 P 172 P 451' P 451 P 54 P 654 P 12m P 1277s Pl R R P' :l: P 1115 P 115 p 455 P 455 P 197, P 1 19?` P 765s P 763s P i? R eP P f* P 3497s PI 1%' P- Attest: 5497s P' g/Mm/ l We@ Inventor: by e H. c. PETERS.

[To auw/imam@ mm: Y

HEBER c. PETERS, or NEW. YORK, N. Y.

'cALc'ULA'ron `lie it known that I, HEBER C. PETERS, a.

citizen 0f the United States, residing `at New one. accumulator operable to Aobtain directly York city, .county of'New York, `and State ofNew York, have invented new and useful Improvements iln Calculators, of which the following is a 'speci`1cation.

IMy invention relates. to` calculating andlisting' machinesA equipped with more than the4 arithmetical difference between two vamounts and also recapitulate individual totals".4 'Means are also provided whereby a printed' list, bearing La completerecord of the 'various operations and the' order in` Vwhich .they occurred, isobtainable.

vThe machine disclosed "and claimed in this applicatiomis a Variation ot the broad prin- :ciple described and claimed in my applica# 20 `1913, whereby subtraction lof amounts accu'- 'inulated uponl an accumulator' is 'secured by the complement ofa substrahend registration, Serial No. 802,911, filed November 25,

adding to said accumulation, the complement of another amount accumulated upon the' other accumulator, another. variation of said 'broad principle being also disclosed in mv application Serial No. 844,150, filed J une l,

One object my invention is to provide in a machine equipped with at least two accumulatore, or registers whose addingwheels i .I preerably'locate-so as to be visible, means independent of the number keys for commu nicating to one accumulator throughuts ac tuatorsthe complement of a registration .ap-v

thev extent of -movement of the actuators preferablyl while they are `disengaged from the .accumulator on which appears the amount Whose complement is being"commu.;

' iiicat'ed t0 another accumulator. Provision i-smade for stepping all'tlie actuators, vexcept the actuator of lowest order', a distance' equal to that required to register the differ.v

- complement is being communicated `and '\9.

The .actuator` of lowestorder is always stepped the distancerequ'ired to register the 'diderence between the digit appearing on the lowest order adding wheel and 10.. Thus,

inn" machinevv arranged to compute by `the decimal system, I arrange that each actuator -abovethe units actuator shall move a distance equal to the dili'erence between@v and.

thegure appearing on its cooperating add ingwheel in the accumulator bearing the number -whose complement is sought, and. i

that theunits actuator shall move a dis- `tance `equal tothe differencebetween 10 and thev figure onthe units adding wheel insaidm.

accumulator. Tjhus therev is setup in-.the`

which is the complement ofthe number ap- `}g ez ir1 ng onsaid accumulator.: This comple- Qmentary amount is lthen registered in the actuators in one operation a vsingle amount other accumulator. By the complement. of 'i mean the-remainder obtained b y subtracting that number from the maximum accumu lating capacity vot the #machine plus 1.

. h/Iea.ns are provided preferably to prevent anumber, as referred to iii this application,

the printing ofthis'complementary amount, i

a. special designating sign only being printed when the operation of communicating theI complement takes place. i.

By thse means providedgl can thus addto .the true arithmetical difference between the 4 two registrations.

a minuen'd registration onone accumulator gether onone accumulator thecomplements of the various separate ytotals ofthe items originally registered -on another accumulator. Then with tlie vfirst accumulator reset to zero, the complement offthis sum so obtained on the second acci'imulator ig at will communicated vto the vfirst accumulator -this communicated amount being the-.truel su'm. of the various separate totals which originally appeared on the first accumulatori as willbe fully explained presently Thus, I

am able to obtain a recapitulation of the sep` the sum of' the 'complements of two or more numbers equalsthe complementof the sum` of-.those numbers. l

It is obvious while performing recapitulation that the various separate totals and also their recapitulation will, asl a consequence of the above operation, appear on the same accumulator. This recapitulation is] obtained, it will be noted, without transferring these totals to another accumulator, wliic .method I lbelieve tobe broadly new with melf? IV provide means fory printing only al ica special designating sign when either accumulator' is resetl to zei-ofthe tota-l or sum of the Y place.`

items notl being printed. This operation of resetting the accumulator to zero w1 term` clearing the accumulator, by which 1 mean the operation of resetting the number Wheels to Zero, andnot an operation performed subsequently thereto. For convenience I pret'er to print sums solely through the Well-known operation of sub-totaling Ywhereby the amount on the adding Wheels remains thereon after `the operation of printing takes Means is provided for locking either aecumulator in a Wholly inactive position at Will, said locking means being arranged so that when one accumulator is active the other accumulator is always Wholly inactive during any partial or complete operation of the machine. Since amounts canrbe registered in an accumulator only when that accumulator is active, and since only one accumulator can be active during any one partial or complete operation of the machine. it is evident that when the operation of communicating takes place the accumulator .on which appears the number Whose complenient is to be communicatedmust be inactive,

and the other accumulator on which the complement is to be registered must be active.

1When said locking means is in a half-Way or intermediate position both accumulatore are rendered inactive and items listed then will not be accumulated. Such non-add or eliminated items may be distinguished by the special designation presently disclosed.

Since preferably only one accumulator is active at any one time, a single means only is necessary to control that movement of both accumulatore which automatically governs the engagement and disengagement of each of the active accumulatore With the racks.` This construction secures a marked sirnplilication in structure and operation valuable for both mechanical and manufacturing reasons, and which, I believe to be new in machines equipped with more than one Vaccumulator and capable of performing `the operation of recapitulation.

For convenient reference, it is desirable to identify on the printed list the accumulator which Was active during any particular operation of the machine, and ivhile this may be accomplished in various Ways, I prefer to use a. polychrome ribbon Whose relative position to the printing line of the machine is shifted transversely when an accumulator` is thrown into or out of action. The dilfer'- ent operations in the various accumulatore are thus contrasted in colors on the printed record. This arrangement requires but one set of designating signs for both accumulators; as the various designations of the operations will shoT in a color identifying the accumulator active at the time they-Were printed. Thus the structure and operation of my invention over machines of the prior art is further 'simplified When both accuinulators` are inactive, duel `to the half-Way position of the locking means, the polychrome ribbon Will be shifted transversely only to its midway position,

and an amountthen printed Will show With its upper portion in one color and its lower portion in a contrasting color. By this double color nonadd or eliminated items, referred to above, may be-distinguished.

`Furling the Wimmer/cal difference. Exemple I y 1st accamu- 2d acetamini later P. Zator R.

Keyboard 165 P 862 P 450 P 1477s l? 967 R 2326s R' 9998523 Example 2.

Ist'accumu- 2d accumu Y Zatoi- P. Zator R. Keyboard 160 R 160 197 P 197 v860 R 860 1162 P 1162 450 R 450 2326s P 1470s R 9998530 9998520 -ll0 00008565 P .Assume as a result of items listed totals appear in both accumulatore and their arith Since in my y -set up in the racks an amount which is the complement of the smaller total (on the inactive accumulator) 'Which complement is added to the larger total, (on the active accumulator) the sum of these tivo amounts amaai gxducing the arithmetical difference sought.

t' his complementing amount isnot printed but aspecial designating sign #1: in' the colorv distinguishing-:the active counter is printed at, the time indicatmg thi'svoperation has 4been performedf` :In the examples given herewith and in Figures 17, 18, 19 and 20 I'Nh'ave lassumed the machine to be e uippedwithga purple and red bichrome'l rib on. To assist inv making the description clear, I have distinguished by theletter'P such items, sub-totals, and designating signs as-Would be printed in purple, and by the letter R such'itemS, subtotals, and designating signs as would be A' printedin red. Thus, if on one accumulator of seven columnsV capacity there 'is added' consecutivelyamounts-165, 862 and 450 as `a v result of lthis there will appear inthis accumulator av sum of' 1477 (see Example .1,

- alsov'Figf17) which may be'printed as a subtotal'and will be distinguished assuch by the sub-total designating sign s It vwill also "be printed in -the 'color designatingl the counter active during the above operations.

vThen if bya proper 'operation' of the lockingl means another accumulator is' made active and there 1s added 1n thls other accumulator 197, 1162 and 967 as a result of this a sum of'2326will'appear in the accumulator which v.may alsobe2-printedand designated as a sub-total. This, too,'will be printed in the' color ,distinguishing the active counter,

which color will be different from that indieating the sub-total 14:77 previously printed. On the. printed record will thenappear a .grouper items and rits sub-total printed in one color-and a second group of items and its sub-total printed in acontrasting color.

At alglance it is seen that the amount in the second accumulator exceeds the amount in the irst accumulator and since it is deactive position, and then by the operation of mechanism provided interference stops are placed in the paths of step plates mounted onn the forward moving rack supports tens rack moves forward `two spaces; the, yhundreds rack five spaces andthe thousands v said stepplates being located" so that the units rack moves forward three spaces; the

rack eight Spaces. All other""ra'cks move forward nine spaces.'` There'will thus be set up vin the racks 9998523 which number is the difference between v1477 'and the maximum accumulating capacity of the machine 'plus 1; This complementary. amount is not printed. Only av special designating jsign if: inthe "color'ofthe active counter is printed to 4show that the operation hasitalrenuplace` On the nism provided, this complementary amount is added to 0002326 (on the active accumulater-) The sum 998523 andy 0002326 is the active accumulator' will appear only 0000849, which number is` the arithmeticalI difference between 2326- and 1,47 7 :mainder 849 can now-.be printed on thereo- This re ordslip andwill appear-asa sub-total in the color in `which 2326 was printed. Thus, by

my method, theremainderor balance always printsinthe, color corresponding to that in Whichthe larger amount was printed. This enables the observer to determine readilyl whether lthedilerence shown is a debit or a"cr edit." balance. It should be noted that insetting up the above 4complement 9998523 in the racks, the unit rack moves one point farther than the tens rack although .the same digit 7 shows in both the units andtens column Voit the originalnumber. *This 'provision, whenv communicating a complement for always step-ping thelowest. order rack one space farther than' would be requiredto return movement of the racks, by the mecha` f7()` 10000849, Since, however, theaccumulators are 01E-but seven columns capacity, the digit e 1l at the'extreme left will disappear, and on register the `difference between 9 and `l`the ig-` y ure appearing on the lowestford'er 'adding' 'wheels is an important feature of my'invention.

It is evidentthat the items and sums show-n in 'Example could be reversed in their re-. vlation tothe counters concerned, that is, the

larger amount could appear on the first accumulator and the smaller amount. 0n the second accili-mulator.l (See Example 2, also ,'Fig. 18),* This would'mean that .the color v designations for items, sub-totalsand desig- '.natingsigns would also, be reversed land by` this Areversal of color a glance' at the printed slip would enable the observer to see what `i had been-done. y

Also 1tis not compulsory in'my device that items added in the accumulators be. listed consecutively. iBy referring to EX` ample 2 (also Figi-18) 160 Ymay be added in the secondaccumulator and would be printed on the record slip vin the color distinguishingthe second accumulator. The-n by a proper opera-tionv of the locking mea-,nsI the;4 first accumulator can be made active i and the item 197 registered on the first 1c-- Cu1nu.la tor;. this would also be printed on th'e'record slip but in the colordistinguishing the rst accumulator which A'contrasts with that in which l160 was printed. Similarly, the items S00-, 1162, 450 and 907 can be. interspersed, the color in whiclithey are printed distinguishing the accumulator on which they lwere registered. As a result 'ot lthis work,v there will gappear on the second accumulator 1470 which represents the sum of items registered on said second accumulao' ft `j .Jv Y laand there ywould appezi'rpnrv the first accuinulat,or` 2326 .which represents the slim of the items lregistered on, said rst accumu-` lator. plffothi-these sums can be printed and designatlilas sub-totals by sign s in the-r color distinguishing the laccumulator on which they are registered. Since it 1s de-j slred to find the arlthmetical `difference betyveenthese two sums it is evident that the i complement of 1470 should be added to 2326.

In this case zero being in the units column,`

the unitsrack` will advance yten spaces;- the tens rack two spaces, `the hundreds rack fivespaces, and the thousands rack eight spaces; all other racks nine spaces.

' There will thus be set up in the racks an amount such as might be represented by 99985204110 which is the equivalent of 9998530. This added to 2326` in the first `accumulator equals 0000856, which is the arithmetical difference desired;` This proy vision, when communicating a` complement, for moving the units rack to `rotate the umts `Wheel a complete revolution from zero to Zero when zero appears on said units Wheel is also an important fea-ture of my invention.

Let us assume that Awith an accumulator in active relation with the racks there are set upon the keyboard successively and accumulated amounts of 165, 832 and 460. These total 1457. By locking the above accumulator in inactive position, the complement of 1457 or 9993543 may be communicate/dto a second accumulator (rendered active when the first accumulator was made in-A active)` During this operation a designat- .ing sign only, in the Vcolor of the` active accumulator, is printed to show what has taken place. The second accumulator 1s been done.

,then made inactive fand' the 4 first accumu- Viator active and reset to zero, a (special .designating sign t in the color 4of the first n accumulator being ,printed *to` show that this latter operation has taken place. Similarly items 172, 451 and 654 are totaled in the first accumulator and ,theY complement of y their sum 1277 which 4is 9998723 `is communicated to the `second accumulator by the means and method described and added to the complement 9998543, the sum of these two making 9997266. This comn'nmicating operation is alsov indicated by the special designating sign- #i printed in the proper color. The firstpaccunnilator is again reset to zero, the designating sign s' printed in its proper color showing what has been done. Continuing the operation of' recapitulation, items 113, 453 and 197 beng. added on the iirst accumulator totals 763 and its complement 9999237 is com. municated to the second counter. The special' designating sign ,it in the color dis tinguishing the second accumulator being printed to show this had been done. 9999237 added to 9997266 the sum already in the second accumulator equals 9996503. The first accumulator is now made active and reset to zero. The special designating sign i in the color distinguishingthe Afirst aecumulatorbeing printed to show this has The complement of the sum appearing on the second vaccumulator, (nou7 inactive) is then communicated to the first accumulator, the designating sign :tl: in the proper color being simultaneously printed and which will be noted is in a contrasting color to that in which the previous communicating signs areprinted. AS a. result,

of these operations there appears on the first accumulator 3497. This number 3497 it will be seen, is the sum of recapitulation of the separate totals 1457, 1297, and 763.

(-See Fig. 19). `l thus secure a recapitula tion of the Various separate totals7 which recapitulation appears in the same accumulator in which said separate totals were first registered, and this recapitulation has been obtained not by the transfer of totals as has 4heretofore been practised but by the confr i munication of complementary amounts only.

While the order` of operations for :recapitulation described above assists in making clear my method, in actual practice I ind it unnecessary to communicate the complement of the total of the last group of items to the second accumulator or to reset the first accumulator to zero. With the'first aecumulator active and the second accumulator inactive, I prefer to communicate to the total of the last group of items on the first accumulator the complement of the amount standing on the second accumulator,

which sum is the recapitulation desired.

' Thus, if when 763 (see Example 3 and Fig.

it had been communicated the complement of. 9997266 onthe second accumulator (which is '2734).the sum'of v763 and 2734i4 equaling 3497 the recapitulation desired,`

, ing the positionr assumed by certain .parts when the lcancellation key vis depressed,- and `vbefore the 7 operating -leverhas been would appearv on the firstlaccumulator.

lIt will beevident from the above description` examples, and figuresreferred to there-v, 1n that Ithere appears onthe printedv list a complete record Aof all the-operations performed shown inthe order in whichth'ey occur.I Thus the cancellation of an amount when the number wheels are reset to Zero is shown by `the specialfsign "i the color l5 in which it is lprintedidentifying the accumulator whose number' wheels were so reset. The items entered'on thekeyboard are printed in the order in which they are entered, the

' A rblank stroke of. the ,machine (during which' no work is -perform'ed isv lindicated color in which they are printed Aindicating theaccumulator Iactive at the time and on which they would, therefore, be registered.

by a blankb'space between printed amounts or designations.`-` lThe; sum of-items added 1n. eitherfaccuniulatonis indicated by'the designating signfs, the` color in whichI thissuml and designating sig-n is ,printed identi;l

fying the accumulatoraffected. An amount communicated yfrom one accumulator to an,`

y other' is indicated by thespecial vsign thecolor in which it is printed identifying the accumulatorjto which the amount was communicated. A nonaddedl or` climi-'- nated" ;ite1n will ,show in a double color vas i fully' described before. ,Th`e net difference :between twol amounts 'or balancef will be automatically printed in the color which tov identifies the. accumulator upon which the larger of the two sums was registered. lt is also evident that my use of designating signs is .not confined merely to identifying amounts or the registering. condition of the number wheels as has been theusual practice heretofore, but also serves to. identify botlrcancellationand calculating operations of the machine which affect the -registering condition of the accumulatore, the amounts involved being prevented from printing on the record.

Fig. ly is a plan View of amachine embodying my invention with portionsof the casebroken away,

' Fig.-2 is aside elevation of Fig. l showing so'me parts in verticalsection. Fig. 3 1s aside elevatlon on a'i-larger scale and showing in .greater detail parts shown onlypartiallyor Wholly omitted in Fig. 2,v f Figi a is a plan view of the accumulating mechanism shown in Figs. 5 and, 6, Figs. 5 and G are vertical sections on`the iines 5?) and (5#6 respectively of Fig. 4

- looking in thel directions indicated by the Fig, 9 'is a vsie@ `imam ai` detail Showoperated.4 Tliedotted lines show position assumed by the designating si gn'tvpefhammervand operating lever when the latter is moved to its forwardposition,

' Fig. 9FL is a rearview of a'portion of` the keyboard,` Fig. 10 'is a detail view in front eleva,- tion at about the. line l0-l0` of Figssgl and 2 looking in the arrows,

1 Figs. 11 and insection, of mechanism for lcontrolling the ribbon shift when. either accumulator is lmade active, 4 A Figs. 13 andnl are side elevations, vpartly in section, illustrating the positions assumed by certain parts when the uoperation of communicating a complement takes place,`

12 are side` elevations, partly' the 4direction yshown i i `.Figs land 16 are sideele-vations illusi tra'ting in greater detailthe controlv of the designatingfsign type sector bythe operation of the subtotal and cancellation keys,

Figs. 17 i020, inclusive, are examples of printed operations-performed by myf-inven "tion. .Y i

vGeneral arrangement."

vention byv those skilled in the art, and incidentally by Way of demonstrating its To aid'inl a ready understanding :of my inloo adaptability to4 known types of adding ma- V y ch-ines, I have chosen to illustrate` the same in the present instance' asvapplied to a ma Vchine having the design oflthe one known and sold upon the market as the'Burroughs Visible, which machine corresponds vin thea mainawith that shown in Patent No.' 763,692

`William Henry Pike, Jr'.

,I employ `with slight alteration the base iss'uedJune 28, 1904i, on the invention of l, side frame Qand case 3 (Figw 2)' of said i prior machine. -VThepaper carriage which ila` supports the platen 880 and the mechanism for moving and positioning this platen laterally or feeding it vertically, the sub-total key 702 and mechanism controlled by it,the amount keys 201 arranged in the usual de nominational rows and supplying stops for limiting the movement of rack bars 404, de-

tents 205 for said rack bars cont-rolled by y said number keys, means for restoring depressed number keys to normal, printing mechanism, the operating means and its conl nections, the means for compelling afspacn ing stroke before printing the sum of items listed, and other familiar and well known` mechanism found in this type of machine,

ist

are all substantially in my machine identical lglith that embodied in Said Burroughs Visi- I employ substantially the ribbon mechanism found in said prior machine which consists of two ribbon spools 600 mounted on arms 601, said arms pivoting on shaft 420. These arms are enlarged at the end which supports the ribbon spool, a part of this enlarged portion being bent at right angles to the arm proper to afford the necessary support. A U-shaped rock frame 602 is supported at each end on studs 602% said studs being mounted in the side plat-es 700 (see Fig. 10). Each of the two arms of said frame 602 connects with studs 601a mounted in the arms 601 and serves to move arms 601 as a unit and thus operates to shift the ribbon spools 600, which movement shifts the ribbon transversely with respect to the print. ing line. The operation of shifting the rib- Y bon is brought about by rocking the bell crank 36 which is connected with the arm 601 at 36, said bell crank being pivoted at 36b and having motion imparted to itthrough link 35, which link is connected to said bell crank at 35a. The ribbon spools 600 are so positioned as to carry a bi-chrome ribbon in front of the type by the use of which impressions are printed on the paper. While the mounting ofthe ribbon spools and their location in the machine and general shifting operation is Vsimilar to that employed in the Burroughs Visible machine, I

have determined, by proper mechanism, that this shifting of the ribbon shall take place simultaneously with the shifting of the accumulator Control slide 30, the operation of which will be described more fully later.

I utilize the usual rack bars 404, somewhat lengthened and supported at their forward ends by a cross rod 1Q Aand guided by collars 12a fixed to said .rod by screws 12b (see Fig. 5). The usual racks 405, also lengthenedto enable them to engage either' accumulator,

are mounted on said rack bars in the custom-I ary manner employed in machines of this kind. The rear end of rack bar 404 connects i move the 'type sector a corresponding amount. rigidly fixed thereto, one to each bar, are step plates 48, whose function will be fully described presently. Rack bars 404 tend to move forward under tension of spring 404e (see Figs. 2 and 3) but are restrained from so doing by the usual detents 205, controlled by the number keys and located at the rear of the keyboard. They are also restrained by the usual bail 401 mounted on arms 400,

' said arms being supported yon shaft 420 and rigidly lixed thereto. Bail 401 co-acts with type sectors 611 (see Fig. 13) and is gov- Mounted on rack bars 404 and erned in its movement by cams 000 rigidly mounted on shaft 922. In saidprior machine this cam allows the racks to travel a distance from 0 to 0 but, in order to secure the results I desire, I decrease the radial distance of the cam face 000a from the center of theshaft 922 so that the travel of type sector 011 is increased and the rack bar and likewise the racks are free to move one step farther when required. In my mechanism it is necessary for the units rack to move from 0 position to 10 position on occasion,

and for this reason the above cha-nge is made.

sign type, in that the detent 501a on this,

hammer is omitted, as shown at 501" in Fig. 16, and said hammer is thus free to act when the operation of the other hammers is prevented by bail The accumulatore operate by the familiar method in prior Burroughs machines where by the yadding wheels when accumulating items are disengaged from their actuating racks during said racks forward movement on the first half cycle of the operation, and prior tothe return movementv of the racks, the adding wheels are engaged with said racks so as to be turned thereby when the racks are restored to their normal position. A Lcarry from a lower order to the next higher order adding wheel is obtained by the familiar one step movement of the rack as in the well known Burroughs machine. Subtotals are obtained by the familiar method of engaging the racks and adding wheels and rotating the adding wheels backward to zero during the forward movement of the racks and continuing this engagement of the racks and wheels during the return movement'of the racks so that the amount which appeared on the number wheels is re stored thereto. I cancel an amount in either accumulator by rotating the adding wheels to zero, on the irst half cycle of an operation while they are engaged with the racks, and then disengaging the racks and wheels while said wheels are at zero position, the racks being then returned to normal while the wheels remain at zero. I vary this operation, commonly known as taking a total,

For Athe accommodation ofthe two ac.- oumulating sections which I have designated as yA and B, I extend the front part of the casing and correspondingly extend the sup' y porting frame work (see Figs. 1-7-8) so that the two vsets of registering 4wheels may stand one just in rear of the other; lthe top of the casing being Slotted at ,9 as shownA in4 Fig; 1, so that-the numbers ofv both sets of wheels arevisible. To the right and left of the accumulating sections and mounted on basel are sub-frames 10 (see Figs. 2*-4) which are fastened to-base 1 by screws 10a.y

Screws l()a vclamp ears l()b to the base, said' ears l0b being. an integral part of the subframes 10 being bent at right angles to the. sub-frame v proper. frames-are cross rods 1'1 (see Figs. 2-'l--5/-) .Connecting the suband rod 12. .These .rods and `sub-frames are clamped together by nuts 11a and .12b re spectively. Supported onl rods 11 are gear detent plates 13 (see- Fig. 5) wl1i'ch.are.

located a uniformly proper distance apart byseparatorstrips 13a. On 4the detent plate 13,' is .the gear detent 13b whereby any rotation ofthe registering wheels of the accumulator when disengaged from the racks is prevented. Supported in'sub-frames 10 and journale'd thereinare .twovshafts 14E. Supported byv these shafts'and lrigidly fixed thereto' are side plates 15 (see Figs. 4 5) a'nd partition plates 15a which are located a.-

uniformly proper distance apart lby separa .tor strips 15b. Rods 16, of which there are four, lextend through the division plates 15a and side plates 15, and 4serve with the separator strips 16a to form a rigid frame 'for the support of the registering wheels `of the accumulating sections, which frames pivot` onshafts 14 in the journals Vprovided in subframes 10, which .arrangement allows said Q frames to be rocked when the adding gears' p are moved 1n and outof mesh with the racks.

Shafts 17'A are supported in theside plates and division plates 415 and 15a respectively, and on them are mounted the usual adding wheels, each consisting of a numeral disk 313, a ten-tooth gearwheel 385,' and a. snail cam 311, as shown in Pike 763,692. In addition'to these, however, I include a graduated cam, or step cam 18, (see Figs. 4-131/l) `which has particularly to do. with the operation of my-device and whose function will be fully described later. These four pieces 313, 385,311 and 18 are mounted on a common sleeve 17a' and are pinned together for rotation as a. unit, the sleeves 17at rotating' freelyon shaftsl `11"' The' depending 4ears .at the front' end Vof detent plates 1'3 afford a ""}s11pport for a shaft'19, 'which' passes through all these plates 13. Loosely mount ed on shaft 19 are levers 20 which perform the same function as levers 303 illustrated in Piks 763.692, but in my machine they have L,been"extended 'and lengthened so that they coact' with the snail cams 311'of` both accumulating sections A and B. `Each' lever 20 is held normally in position under tension of spring 20a,` its upward movement being arrested at its rear end by contact with the face of latch 21. Each latch 21 is supportedv on a shaft 22, said shaft being supported in the detent plates 13. The lower end of latch 21 tends to move'forward under tensionof spring 21, this forward movement being restrained "by contact with a shouldered stop on. end olf lever 20.. When lever 20 is lde.A

pressed, however, thelatch 21 is free to Amove to the second. shoulder stop on lever 20, and in this position it holds lever 20 depressed. Y(See Figs. and 8.) Latch 21 is restored to its rearward or normalposition by the movement'oflbail23, which is supported at each end by arms 24, said arms be'ing mounted on and rigidly fastened to sha-ft '25.

The movement of the bail is ac complished bythebackward and 'forward movement of the long vconnectinglink 2o which is actuated by'- the mechanism which controls the in and out of mesh movement of the yaccumulators with the actuators. This movement of linlr26cal'1sesroll 26a to contact with arm 24(see Fig... 6).,this Contact moving the arm 2're-arward. andl thus mov ling the bail 23 rearward. `Bail 23 contacts with the depending arm 21bof latch 2l, and moves it from the position shown in Fig. 8

to that shown in F ig.f7 and thus restores il' to normal and with it the lever 20. When registering wheel` passes from itsv9 toits (l position, it isarranged that the toe ,311a ot' the snail `cam 311 shall Contact with the ear 201 and move said arm downward against the tension of spring 20, 'lhis'downward movement of arm 20 carries .with 1t ear 20, sald ear 20Sl projecting 1n an opposite direction from the-arm 20 than do 4the ears'20 The ear 20c normally forms a detent for the rack 405 of next higherorder and actingv to Y' arrest said rack one step short of its maximum travel by contact with the step stop 105a (see F ig.k 7a)- `Since therack bars 4.04 move rearward this additional one stepdns.`

tance, it is evident that the spring 460 (one end'of which is connected to the rack 4:05 and o ne end to the, rack bar 404) will be put under tens-ion.V `Removing the interference of 20c from rack 405 will, therefore, permit the rack to advance'theadditional one tooth` step 4when the lever20 is depressed by the lsnail `cam 311 of the adjacent lower .order adding wheel and in this manner provision 1s made `for carrying aunit to thewheel of4 neX-tA higher. order when thejadJacent wheel` of lower order has completedv a revo-1A lution. To prevent overthrow of` arm or` lever- 20 through the action of snail cam'31l, j

I provide a stop 2T mounted ou. .shafts 28,1

the projecting end of which 27'l is located to cofact with the lower face of ear `20c of lever 20. 1

@omiten control slide.

Atfthe left of the machine and supported by shafts 11, I provide a plate 29 (see Figs. (S4-114,42) on which is mounted the accumulator control slide 30. This slide in appear- `ance.resembles an inverted T. The arm 30a projects upward through i the case, and furnishes the operator with a means for moving the slide 30 backward and forward, at will. The slots 30", in said slide 30, lit on studs 29 mounted in plate 2.9, and make this movement possible. Slidr 30 has two cam faces 30c onits upper side and a cam face30 on its lower side (see Figs. o and 12). Each cam face 30c co-actswith a. stud 15d mounted in the side plate 15 of each accumulator frame. As slide 30 is moved in one direction, the coaction of cam faces-30c with studs 151 rock both accumulator-s, the effect being todisengage and i raise one accumulator from the racks and lock it in a wholly inactive posi- `tion, whereas the other accumulator is simul taneously lowered, engaged with the racks and assumes an vactive position. Therefore, it is evident that through the control slide 30 only one accumulator can be active at one time, and thus in effect my machine operates always as a simple single counter'machine because at nortime 1sY there more Vthan one accumulating section 1n active relation with the racks during any partial or complete` cycle of operation of the mechanism. "When the control slide is ymoved to a half-way position, both accumulators will be in a partially raised position and both will be out of active relation with theracks.` When this occurs, it is evident that items listed will not be addedin either accumulator.

The lower cam face 30d of slide 30 co-acts with the roll 3lbof the arms 31.` Arm 31 ivots on stud 311, said stud being mounted in plate 29 (see Fig. 6). 'The back and forth movement of slide 30 thus moves the free end of arm 31 up and down, and with it the link 32 connected thereto. This in turn will rock the bell crank 32c pivoting on shaft 28 which in turn will move back and forth the long connecting link 33 by its connection to bell crank 32. `Link 33 is connected at its rear end withV bell crank 34 and link 35 connects it in turn with bell crank 36. Bell crank 36 hasta forked end which straddles stud 36, said stud being mounted l a in the arm 601 of the ribbon carrier. It will thus be clear that as the slide 30 is moved back and forth to move a counter into active or inactive position, such movement of slide 30 at the same time affects the position of the ribbon supporting means, and through i the connectionspist described, the rocking of fifibell crank 36, will move the ribbon carrier 601, and through it tht-ribbon spools 600 will be shifted so that" there is brought to printing position one'or the other of the contrasting colors of the bi-'chrome ribbon, said color identifying the counter active at the time. Should the slide 30 be moved to its half-way position, at .which position both accumulatore are inactive, it will be evident Cancellation key.

At 37 (see Fig. ,9) I provide a cancellation key by the operation of which the registering wheels of either accumulator may be reset to zero without printing the amount standing on the wheels. Key 37 is mounted on the side plate 200 ofthe keyboard, being supported by screw stud 37a and stud 37",

the slots 37c permitting an up and down movement of the key. Projecting at vright angles to face of key 37 is a stud 37Pwhich contacts with the lever 213. Depressing lever 213 Sets ready for action the usual mechanism forlreturning the registering wheels to zero, as in the operation commonly known as taking total. Depressing key 37 acts also, however, to rock bell-crank 38 which is mounted on base 1 by bracket 38, this rocking movement being produced by the lower end of key 37 coacting with the stud 38 on the end of the longer arm of bell-l crank 38. This motion is imparted to long link 39 by the co-action of the shorter arm "of bell crank 38 with the roll 397L mounted on link 39. This movement of link 39 by itsconnection at 39b rocks Vbell crank 40 mounted on base 1 by bracket 40, said movement in turn moving the connecting `link 41 upward. Link 41 is pivoted at its.

upper end with rock arm 42, which'is loosely i mounted on shaft 43, its only purpose being to supply a guide and support for the up per end of link 41. Aroll 41a is mounted on link 41, which roll contacts with the cam surface 44a of lever 44;, said lever 44 being loosely mounted on shaft 43 and co-acting atrits upper end with the roll 5033 which is mounted .on arm 503, said arm being pivoted at 503b and is a portion of the mechanism for controlling the nonprint device of said prior machine. Thus vwhen the link 41 is raised bythe depression of key 37, the roll 41a contacting with the cam surface 44SL of lever 44 rocks the lever 44 and its upper end co-acting with the roll 5032L depresses lever 503 and removes the upward projecting finger 503c of lever 503 from contact with bail 504, allowing said bail 504 to rock downward and engage detente 501 of type hammers 501. In this way the type ham- 

